Historic Earthquakes: Travel Times

Magnitude 3.8 NEW JERSEY
2003 August 26 18:24:18 UTC

This map shows the predicted (theoretical)
travel times, in minutes, of the
compressional (P) wave from the earthquake
location to points around the globe.
The travel times are computed using the
spherically-symmetric IASP91 reference
earth velocity model.
The heavy black lines shown
are the approximate
distances to the P-wave shadow
zone (103 to 140 degrees).